1. Power Supplies

2. Takes electricity from the wall socket and transforms it into electricity to run the motherboard and other internal components

3. UPS UPS - uninterruptible power supply (UPS) – –Protects your computer (and, more importantly, your data) in the event of a power sag or power outage – –A UPS essentially contains a big battery that will provide AC power to your computer, regardless of the power coming from the AC outlet

4. Uninterruptible Power Supplies Benefits Benefits –Condition line for brownouts and spikes –Provide backup power during a blackout –Protect against very high potentially damaging spikes Considerations Considerations –Cost –UPS rating –Degree of line conditioning –Warranty and service policies

5. Power Supplies

6. Power to the Motherboard Use a 20- or 24-pin P1 power connector. Some motherboards may require special 4-, 6-, or 8-pin connectors to supply extra power

7. Power to Peripherals: Molex Molex Connectors – –The most common type of power connection for devices – –Need 5-volts or 12-volts of power is the Molex connector – –The Molex connector has notches, called chamfers, that guide its installation

8. Power to Peripherals: Mini Connectors Mini Connectors – –A second type of connector, called a mini connector – –Supplies 5 and 12 volts to peripherals, although only floppy disk drives in modern systems use this connector

9. Power to Peripherals: SATA Power Connectors SATA Power Connectors – –Serial ATA (SATA) hard drives need a special 15- pin SATA power connector – –The larger pin count supports the SATA hot- swappable feature, and 3.3 V, 5.0 V, and 12.0 V devices. SATA power connectors are L shaped, making it almost impossible to insert one incorrectly into a SATA drive – –No other device on your computer uses the SATA power connector

10. Power to Peripherals: Splitter & Adapters Not enough connectors to power all of the devices inside your PC – –Purchase splitters to create more connections